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Finding the Fourth Proportional to 243,139.80, 364,551.30 and 218,256.60

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Solution

The fourth proportional to 243,139.80, 364,551.30 and 218,256.60 is: 327,242.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,139.80 : 364,551.30 = 218,256.60 : x
  2. Step 2: Convert to fraction form
    243,139.80/364,551.30 = 218,256.60/x
  3. Step 3: Cross multiply
    243,139.80x = 364,551.30 × 218,256.60
  4. Step 4: Simplify right side
    243,139.80x = 79,565,727,263.58
  5. Step 5: Solve for x
    x = 79,565,727,263.58/243,139.80
  6. Step 6: Final answer
    x = 327,242.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.